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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Microscopic - make sure not sterile - very few bulls are actually tested






2. Important 'landmark' during palpation






3. (male) pushes the testes upward toward the body for warmth or protection






4. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






5. Allows extension of penis without fibro-elastic penis






6. Days which have decreasing daylight hours

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7. To remove/separate testicles from animal's body before animal reaches puberty






8. 26 hours after estrus begins






9. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






10. 19-23 (21) days






11. 1-3 days






12. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






13. 147 days






14. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






15. (LH) causes female's egg to break (her period)






16. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






17. Luteolysis happens because of the ____________ hormone






18. Not under a timeline - cow can not be sold as steak






19. 30 hours after estrus begins






20. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






21. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






22. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






23. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






24. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






25. (LH) causes female's egg to break (her period)






26. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






27. 30-38 hours after estrus cycle begins






28. Duct through penis that carries sperm and urine






29. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






30. Animals which have only one estrous cycle (ex: dog - fox)






31. 24 hours before end of estrus cycle






32. (FSH) causes egg to mature in females






33. 45-60 days after breeding; re-breed as required






34. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






35. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






36. 2 month growth cycle. stored in the epididymis of the bull






37. The more stressed out the male is - the less sperm he is going to produce






38. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






39. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






40. ~60 days before calving






41. Not under a timeline - cow can not be sold as steak






42. Produce testosterone. located between the seminiferous tubules






43. (male) pushes the testes upward toward the body for warmth or protection






44. The more stressed out the male is - the less sperm he is going to produce






45. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






46. 4-6 days






47. What makes the milk flow through the mammary glands?






48. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






49. What about the sperm for a bull which has been castrated but still has testicles?






50. 10-37 (21) days